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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






2. (LH) stimulates the Leydig cells to produce testosterone






3. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






4. 30 hours after estrus begins






5. Days which have increasing daylight hours

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6. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






7. 16-20 hours






8. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






9. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






10. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






11. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






12. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






13. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






14. 1-3 days






15. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






16. Allows extension of penis without fibro-elastic penis






17. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






18. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






19. (switzerland) 2nd in size and milk production - most muscle -






20. 45-60 days after breeding; re-breed as required






21. Superior genes are _______ to multiply






22. The more stressed out the male is - the less sperm he is going to produce






23. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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24. Urinary calculi.






25. 336 days






26. 16-20 hours






27. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






28. 30 hours after estrus begins






29. 114 days






30. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






31. Animals which have only one estrous cycle (ex: dog - fox)






32. 2 month growth cycle. stored in the epididymis of the bull






33. Start of the reproductive tract for the female. located outside of the body






34. What makes the milk flow through the mammary glands?






35. ~60 days before calving






36. 1-2 days






37. 2 month growth cycle. stored in the epididymis of the bull






38. Help to signal hormone levels which we need both in the brain right next to each other.






39. 14-19 (17) days






40. 4-6 days






41. The more stressed out the male is - the less sperm he is going to produce






42. Birthing process (termination of gestation)






43. (male) pushes the testes upward toward the body for warmth or protection






44. Luteolysis happens because of the ____________ hormone






45. (FSH) causes egg to mature in females






46. Parturition is controlled by...






47. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






48. 30-38 hours after estrus cycle begins






49. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






50. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract